Sphincter of Oddi occurs between

Options

A. pylorus and duodenum
B. Oesophagus and stomach
C. Large intestine and small intestine
D. Ampull of Vater and Duodenum

Answer

**Step-by-Step Solution:**

1. **Understanding the Sphincter of Oddi**: The Sphincter of Oddi is a muscular valve that controls the flow of digestive juices (bile and pancreatic juice) from the liver and pancreas into the small intestine.

2. **Identifying the Location**: The Sphincter of Oddi is located at the junction where the bile duct and pancreatic duct meet before entering the duodenum. This area is known as the hepatopancreatic ampulla (or ampulla of Vater).

3. **Analyzing the Options**: The question provides several options:
- A) Pylorus and duodenum
- B) Esophagus and stomach
- C) Large intestine and small intestine
- D) Ampulla of Vater and duodenum

4. **Determining the Correct Answer**: The Sphincter of Oddi is specifically located at the ampulla of Vater, which is the point where the bile duct and pancreatic duct empty into the duodenum. Therefore, the correct answer is:
- **D) Ampulla of Vater and duodenum**.

5. **Conclusion**: The Sphincter of Oddi plays a crucial role in regulating the flow of bile and pancreatic juices into the duodenum, which is essential for digestion.

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